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(No Model.) 3 Sheets-Sheet 1. A. H. WIRSCHING.

A PRINTING TE LBGRAPH INSTRUMENT. No. 496,549. L Patent-ed May v2, 189,3,

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(NQModel.) 3 Sheets-,Sheet 2.

A. H. WIRSGHING.

PRINTING TBLBGNAPH INSTRUMENT. No. 496,549. Patented May 2, 1893.

(No Model.) 3 Sheets-Sheet 3.

A. H. WIRSCHINAG. PRINTING TELNGNAPN INSTRUMENT.

No, 496,549. Patent-ed May 2, 1893.

[E u i y UNITED STATES ALEXANDER H. WIRSOHING, OF BROOKLYN, NEW YORK.

PRINTING-TELEGRAPH INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 496,549, dated May 2, 1893.

l Application filed June 8. 1892. Serial No.435,955. (No model.)

To all whom t may concern,.-

Be it known that I, ALEXANDER H. WIRsCH- ING, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Printing- Telegraph Instruments, of which the following is a specification.

One feature of my invention is especially adapted to the class of printing-telegraph instruments, in which duplex type-wheels and printing-pads are combined with a single printing-lever for acting on either of the pads; and it consists of interchangeable tappets on the printing lever to act on the printing pads, and a shifting-mechanism for such tappets, with its parts so organized that the adjustment of the tappets may be eifected by the type-wheel-shaft at a given point in its revolution together with the type wheels, and independently of the printing lever.

Another feature of my invention is adapted to any general class of printing-telegraph instruments, and consists essentially in certain novel combinations of parts as hereinafter fully set forth and enumerated in the claims.

In the accompanying drawings Figure 1. represents a side view partly in section, of an instrument embodying my invention, minor parts being omitted. Fig. 2. represents a like view of a portion thereof with the parts in dierent position from that shown in Fig. l. Fig. 3. represents a vertical cross section of a portion thereof on the line Fig. 1. Fig. 4. represents a plan or top view thereof. Fig. 5. represents a vertical longitudinal section of a portion thereof on the line y. y. Fig. 4. Fig. 6. represents a vertical cross section thereof on the line z. z. Fig. 4. omitting the shifting mechanism. Fig. 7. represents an inverted plan view of the polarized electro magnet.

Similar letters of reference indicate similar parts. Y

The letter A indicates the type-wheel-shaft having its bearings in the two side plates B, of the instrument, forming also the bearings for the series of shafts of an operating mechanism which is geared with the type-wheelshaft in the usual manner.

C C2 are the type-wheels mounted on the proper shaft at one side of the instrument;

D D2 the printing pads, one under and in the' plane of each type-wheel; e e2 tappets one under and in the plane of each printing pad, and F the printing lever.

Each of the printing pads D D2 is usually in form of a roller, and it is mounted by au axial pivot on a supporting lever D, whence it receives its motion to and from the proper type-wheel under the impulse of either of the tappets. The two pad-supporting-levers D, are hung injuxtaposition on a pivot D3 fixed to one of the side pilates B, and which thus is common thereto and each of these levers is exposed to the action of a retracting spring D4 connected thereto for holding itin normal position, the latter being determined by a stop which may be composed of a pin D5 on the proper side plate. Each of the pad-supporting-levers D, moreover, has a lug D6, for sustaining the impact of either of the tappets e e2, and in the normal position of said levers, they as well as their pads coincide with each other. The tappets e' c2 are mounted on the printing lever F, at or near the free end of the latter, by a common pivote, on which they -are free to oscillate for the purpose of. interchange; and on this pivot is also mounted a pawl with two parts or members e3 e4, in Iixed relation to the tappets, serving to adjust the latter in relation to the printing pads; said two pawls and tappets being firmly united so as to share the motions each of the other. The printing lever F, is fixed to the armature-shaft F of the printing magnet F2, and in practice is actuated by this magnet in the usual manner.

At a point under and in the plane of the pawls e3 e4 is an anchor-lever G, which is hung on afixed pivot G', and the arms G2G3 of which lie on opposite sides of the pivot e, of the printing lever, carrying the pawls and tappets; this lever engaging atternately with either of the pawls by one of its said arms. On opposite sides of and in the plane of the anchor lever G, are two shifting levers I', I2, each of which is hung on a ixed pivot I, and permanently engages one of the arms G2 G3 of the anchor lever, namely, by impinging against it, as shown. The shifting levers I 12 extend upward on opposite sides of the type-wheel-shaft A, and on the latter is mounted a shifting-cam C, in the plane of said le- I o'o vers, engaging alternately therewith under certain conditions to be presently explained, this cam sharing the motion of the shaft and type wheels. The shifting levers I I2 are elastic at their lower ends where they engage the anchor lever G, so as to exert a yielding pressure upon the latter, while at the upper end of each of said levers is a double inclined face, facilitating its engagement with the shifting @am C; and in order to prevent accidental displacement of the anchor lever G, its lower end is shaped to engage a suitable friction stop G4 affixed to the instrument.

Referring to Fig. l, when the printing lever F. is at rest the pawl cgengages the arm G2of the anchor lever, and the tappet e is in position for acting on the printing pad D', while the shifting lever I lies in the path ofthe shifting cam Cg--the other shifting lever I2 being out of such path. If the motion of the shifting cam C, is now arrested as by the operator at the transmitting station, at a suitable point to bring and retain said cam in engagement with the shifting lever I the latter acts on the arm G3 of the anchor lever with a tendency to force this lever to a reverse position, and hence if the printing lever F is now actuated for producing an impression,tl1ereby releasingthe anchorlever-the latter becomes shifted, causing its arm G3 to engage the pawl e4 on the return of the printin g lever to its normal position, while the tappet e2 is brought into place for acting on the printing pad D2; the parts assuming the relative positions shown in Fig. 2. This shifting mechanism for effecting the required adjustment of the interchangeable tappetsc c2 is thus practically controlled by the type-wheelshaft A, thereby simplifying the construction and operation of the instrument. It may be here remarked that when the type-wheels C C2 contain, respectively, letters and figures, it is designed to set the shifting mechanism at the unison point as to theletter type-wheel, and at a dot or other given point as to the figure type-wheel.

The letter J (Figs. 5, 6 and 7) indicates an escape wheel mounted on the intermediate portion of the type-wheel-shaft A. and J. the escape lever serving to regulate the motion of said shaft and concomitant parts. The operation of the escape lever J is produced by the action of the vibrating core O, of each of two helices O of a polarized electro magnet, of which O2 are permanet magnets each in shape of a horse-shoe, its poles acting on said cores in the well known manner for imparting thereto a vibrating motion; and by this mode of operation of the escape lever it acts also as a stop for arresting the motion of the type-Wheel-shaft, the., when the instrument is not in use. O3 is a rock shaft carrying the two vibrating cores O, of the magnet, and O4 a vibrating arm on said shaft which engages a pin J 2 of the escape lever by a fork O5 at its free end, for connecting the escape lever to the cores as more clearly shown in Fig. 5. In practice the magnet O is arranged in a single circuit with the printing magnet F2 of the instrument.

The parts O Ojof the polarized magnet are attached to a bed P, which is mounted on the side plates B, by means of pivots P in order to permit a swinging adjustment of such bed in relation to the escape lever J The adjustment of the swinging-bed P, is effected by a set screw, P2 fitted in a cross bar B of the instrument, and by means thereof the position of the vibrating arm O4 may be varied so as to insure the correct operation of the escape lever J by said arm from the cores O, of the magnet. The escapelever J is mounted by means of its pivot J2 in a bracket S, which is fastened to the cross bar B' by a clamping screw S tted in a vertical slot of the bracket this slot permitting a sliding ad justment of said bracket in relation to the escape wheel, set screws S3 being used for effecting said adjustment; and by this means the escape lever may be readily adapted in position to the size or diameter of the escape wheel.

lVhat l claim as new, and desire to secure by Letters Patent, is-

1. The combination of the two type-wheels, a wheel-operating-mechanism, the two printin g pads, the pad-supporting-levers the pivot common to said levers, a retracting spring connected to each of said levers, and a stop for determining the normal position thereof the single printing lever and its electro magnet, the interchangeable tappets of the printing lever for acting on the pad-supportinglevers and thence on the printing pads, and a shifting mechanism controlled by the typewheel-shaft, for adjusting said tappets alternately in relation to either of the pad supporting levers substantially as herein described.

2. The combination of the two typewheels, a wheel-operatingnnechanism, the two print- IOO IIO

ing pads, the single printing lever and its electro magnet, the interchangeable tappets on a common pivot of the printing lever, the adjusting pawls also on said pivot in iixed relation to said tappets, the anchor-lever engaging alternately with either of said pawls by one of its arms, and a means for shifting the anchor lever by the type-Wheel-shaft, substantially as and for the purpose herein described.

3. The combination of the two type wheels, a wheel operating mechanism, the two printing pads, the single printing lever and its electro magnet, the interchangeable tappets on a common pivot of the printing lever, the adjusting pawls also on said pivot in fixed relation to said tappets, the anchor lever en gaging alternately with either of said pawls by one of its arms, the shifting levers each permanently engaging with one of the arms of the anchor lever, and the shifting cam on the type-wheel shaft engaging alternately with either of the shifting levers, substantially as' and for the purpose described.

4. The combination with a type wheel or wheels and operating mechanism therefor, of

.the escape wheel on the type-wheel-shaft, the

escape lever, the polarized electro magnet having two helices each with a vibratingcore, the rock shaft carrying the two vibrating cores, and the vibrating arm on said shaft connecting the escape lever to said core,-

escape lever, the. polarized electro-magnet having two helices each with a vibrating core, the rock shaft carrying the two vibrating cores, the vibrating arm on said shaft, connecting the escape lever to said cores, the

swinging bed for said magnet, a means for adjusting the swinging bed in relation to the escape lever, the sliding bracket for the escape lever, and a means for adjusting said bracket in relation to the escape wheel, substantially as and for the purpose herein described.

ALEXANDER H. WIRSCHING.

Witnesses:

CHAs. WA HLERS, JAsVS. EWBANK. 

